Move scroll event handlers from layer to layer tree view.

third_party/WebKit/Source/web/ChromeClientImpl.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 876 matching lines @@
         treeView->setHaveWheelEventHandlers(hasEventHandlers);
 }
 
 bool ChromeClientImpl::haveWheelEventHandlers() const
 {
     if (WebLayerTreeView* treeView = m_webView->layerTreeView())
         return treeView->haveWheelEventHandlers();
     return false;
 }
 
+void ChromeClientImpl::setHaveScrollEventHandlers(bool hasEventHandlers)
+{
+    if (WebLayerTreeView* treeView = m_webView->layerTreeView())
+        treeView->setHaveScrollEventHandlers(hasEventHandlers);
+}
+
+bool ChromeClientImpl::haveScrollEventHandlers() const
+{
+    if (WebLayerTreeView* treeView = m_webView->layerTreeView())
+        return treeView->haveScrollEventHandlers();
+    return false;
+}
+
 void ChromeClientImpl::setTouchAction(TouchAction touchAction)
 {
     if (WebViewClient* client = m_webView->client())
         client->setTouchAction(static_cast<WebTouchAction>(touchAction));
 }
 
 bool ChromeClientImpl::requestPointerLock()
 {
     return m_webView->requestPointerLock();
 }
@@ skipping 138 matching lines @@
     if (m_webView->pageImportanceSignals())
         m_webView->pageImportanceSignals()->setIssuedNonGetFetchFromScript();
 }
 
 PassOwnPtr<WebFrameScheduler> ChromeClientImpl::createFrameScheduler()
 {
     return m_webView->scheduler()->createFrameScheduler().release();
 }
 
 } // namespace blink